Question

Solve the equation using mental math.

$\frac{b}{5}=8$

Short answer

Value of given equation is $b=40$.

Step-by-step solution

Step-1- Think provided equation as question in words

$\frac{b}{5}=8$

The question will be as:

What number need to divide with 5 so that it becomes 8?

Hence answer for above question is 40.

Step-2- Checking our answer is correct or not 

Substitute $b=40$in given equation $\frac{b}{5}=8$.

$\begin{array}{c}\frac{b}{5}=8\\ \frac{40}{5}=8\\ 8=8\end{array}$

Step-3- Conclusion

Therefore, as both sides of above expression are same, the value of given equation is $b=40$.